Angular dependence of spin-transfer switching in a magnetic nanostructure

被引：72

作者：

Mancoff, FB ^{[1
]}

Dave, RW ^{[1
]}

Rizzo, ND ^{[1
]}

Eschrich, TC ^{[1
]}

Engel, BN ^{[1
]}

Tehrani, S ^{[1
]}

机构：

[1] Motorola Labs, Phys Sci Res Labs, Chandler, AZ 85224 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 08期

关键词：

D O I：

10.1063/1.1604936

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We measured switching of a thin film nanomagnet driven by spin-polarized current in giant magnetoresistance spin valves as small as 50 nm x 100 nm. Spin-transfer reversal is observed in both dc current and magnetic field sweeps, with a switching current of similar to5 mA, for example, for a bit with similar to900 Oe switching field in zero current. We studied the dependence of spin-transfer switching on the relative angle phi between the layer magnetizations by using a magnetic field to orient the magnetization of a bulk magnetic layer at an angle to a patterned layer held in place by shape anisotropy. The critical current is a minimum for collinear magnetizations and diverges as 1/\cos phi\ as phi increases to 90degrees, consistent with switching current calculations using the Slonczewski spin-transfer torque model. (C) 2003 American Institute of Physics.

引用

页码：1596 / 1598

页数：3

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